Patents by Inventor Gottfried Blaschke

Gottfried Blaschke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation and use of salts of the pure enantiomers of alpha-lipoic acid
    Patent number: 5281722
    Abstract: The pure enantiomers of alpha-lipoic acid are obtained by formation of the diastereomeric salt pairs with the optical antipodes of alpha-methylbenzylamine in solution.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: January 25, 1994
    Assignee: Degussa AG
    Inventors: Gottfried Blaschke, Ursula Scheidemantel, Horst Bethge, Roland Moller, Thomas Beisswenger, Klaus Huthmacher
  • Process for obtaining enantiomers of 2-arylpropionic acids
    Patent number: 4973745
    Abstract: A process for obtaining enantiomers of 2-arylpropionic acids by reacting a racemic mixture thereof with an amine-enantiomer, which process comprises converting the racemate of the 2-arylpropionic acid with an optically active form of threo-1-p-nitrophenyl-2-aminopropane-1,3-diol into the diastereomeric salts, separating these salts and converting the thus-obtained pure diastereomers into the free acids of the enantiomer forms of the 2-arylpropionic acid or into the salts thereof.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: November 27, 1990
    Assignee: Medice Chem.-Pharm. Fabrik Putter GmbH & Co. KG
    Inventors: Gottfried Blaschke, Karl-Ernst Schulte
  • Optically active adsorbents
    Patent number: 4882048
    Abstract: Absorbents based on optically active poly(meth)acrylamides, e.g. bonded to silica gel, can be used for separating racemic mixtures into their optical antipodes.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: November 21, 1989
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Gottfried Blaschke, Werner Fraenkel, Werner Broker, Joachim Kinkel